Ye ZHANG, Xiao YANG, Xin-Rui JIANG, Qi YANG, Bin DENG, Hong-Qiang WANG. Attitude direction estimation of space target parabolic antenna loads using sequential terahertz ISAR images[J]. Journal of Infrared and Millimeter Waves, 2021, 40(4): 496
- Journal of Infrared and Millimeter Waves
- Vol. 40, Issue 4, 496 (2021)
Fig. 1. Space target observation geometry of space-based terahertz radar.
Fig. 2. Geometry model of a paraboloid.
Fig. 3. RCS of the parabolic antenna model at 0.22 THz.
Fig. 4. ISAR images of the parabolic antenna model（a） φ=25°, VV polarization; （b） φ=60°, VV polarization; （c） φ=60°, VH polarization
Fig. 5. Flowchart of the attitude direction estimation process
Fig. 6. Equivalent observation scene of ISAR imaging
Fig. 7. ISAR imaging results of the parabolic antenna model（a） Ku-band radar,（b） terahertz radar
Fig. 8. Simplified three-dimensional satellite model
Fig. 9. Radar tracking LOS angle trajectory
Fig. 10. Sequential terahertz ISAR imaging results
Fig. 11. Solar panel component detection results (marked with blue solid lines)
Fig. 12. Parabolic antenna component detection results (marked with blue solid lines)
Fig. 13. Absolute error of estimated ellipse parameters in each ISAR image
Fig. 14. Absolute error of attitude direction parameters
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Table 1. Main Parameters of the ISAR System
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Table 2. Estimation Results of Parabolic Antenna Parameters
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